A 155 g sample of an unknown substance was heated from 25°C to 40°C. In the process, the substance absorbed 569 calories of energy. What is the specific heat of the substance?


Ans: 0.24 cal/g °C

Physics & Space Science

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Constant Acceleration Kinematics: A car starting from rest accelerates at a constant 2.0 m/s2 for 10 s. It then travels with constant speed it has achieved for another 10 s. Then it finally slows to a stop with constant acceleration of magnitude 2.0 m/s2. How far does it travel after starting?

A. 200 m B. 300 m C. 400 m D. 500 m

Physics & Space Science

An innocent mosquito is flying along the interstate and has a collision with a speeding semi. Which one experiences a greater acceleration (change in velocity)?

A. The mosquito B. The semi C. They both experience the same acceleration D. There is no change in velocity

Physics & Space Science

Which of the following is the coldest at its surface?

A. white dwarf B. type K main sequence star C. main sequence star with a radius ten times the Sun's radius D. 3 solar luminosity main sequence star E. blue main sequence star

Physics & Space Science

The most geologically active moon in our solar system is Ganymede

Indicate whether the statement is true or false

Physics & Space Science